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1.
Mikrochim Acta ; 191(4): 212, 2024 03 20.
Artículo en Inglés | MEDLINE | ID: mdl-38509344

RESUMEN

The facile fabrication is reported of highly electrochemically active Ti3C2Tx MXene/MWCNT (3D/1D)-modified screen-printed carbon electrode (SPE) for the efficient simultaneous electrochemical detection of paracetamol, theophylline, and caffeine in human blood samples. 3D/1D Ti3C2Tx MXene/MWCNT nanocomposite was synthesized using microwave irradiation and ultrasonication processes. Then, the Ti3C2Tx/MWCNT-modified SPE electrode was fabricated and thoroughly characterized towards its physicochemical and electrochemical properties using XPS, TEM, FESEM, XRD, electrochemical impedance spectroscopy, cyclic voltammetry, and differential pulse voltammetry techniques. As-constructed Ti3C2Tx-MWCNT/SPE offers excellent electrochemical sensing performance with good detection limits (0.23, 0.57, and 0.43 µM) and wide linear ranges (1.0 ~ 90.1, 2.0 ~ 62.0, and 2.0-90.9 µM) for paracetamol, caffeine, and theophylline, respectively,  in the human samples. Notably, the non-enzymatic electroactive nanocomposite-modified electrode has depicted a semicircle Nyquist plot with low charge transfer resistance (Rct∼95 Ω), leading to high ionic diffusion and facilitating an excellent electron transfer path. All the above results in efficient stability, reproducibility, repeatability, and sensitivity compared with other reported works, and thus, it claims its practical utilization in realistic clinical applications.


Asunto(s)
Nanocompuestos , Nanotubos de Carbono , Nitritos , Elementos de Transición , Humanos , Acetaminofén , Cafeína , Teofilina , Reproducibilidad de los Resultados , Titanio/química , Técnicas Electroquímicas/métodos , Nanotubos de Carbono/química , Nanocompuestos/química
2.
J Formos Med Assoc ; 123(1): 106-115, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-37385933

RESUMEN

BACKGROUND: Patients with locally advanced esophageal squamous cell carcinoma (ESCC) following neoadjuvant chemoradiotherapy (nCRT) may not always receive resection despite the possible achievement of a pathologic complete response (pCR) being associated with superior survival benefit. We aimed to compare outcomes among ESCC patients with or without pCR and those refusing surgery. METHODS: In total, 111 medically operable, non-cervical ESCC patients after the same protocol of nCRT (platinum/5-fluorouracil plus radiation 50Gy) were prospectively enrolled between 2011 and 2021. Eighty-three of them underwent esophagectomy comprising pCR (n = 32) and non-pCR (n = 51), while 28 operable patients declined surgery (refusal-of-surgery group). Predictors and survival data were analyzed. RESULTS: In terms of esophagectomy, 38.5% (32/83) patients achieved pCR. The pCR group exhibited better pretreatment performance status than the non-pCR group (adjusted odds ratio: 0.11, 95% confidence interval: 0.03-0.58; p = 0.01). Among pCR, non-pCR, and refusal-of-surgery groups, the 5-year overall survival (OS) rates were 56%, 29% and 50% (p = 0.08) and progression-free survival (PFS) rates were 52%, 28% and 36% (p = 0.07) respectively. The pCR group had significantly better OS and PFS than the non-PCR group (adjusted hazard ratio: 2.33 and 1.93, p = 0.02 and 0.049 respectively) but not the refusal-of-surgery group. CONCLUSION: Better pretreatment performance status is associated with higher chance of pCR. Consistent with previous studies, we found attainment of pCR confers the best OS and PFS. Suboptimal OS in the refusal-of-surgery group reflects some of them would have residual disease in addition to complete remission. Further studies are needed to identify prognostic factors of pCR to select candidates who could validly decline esophagectomy.


Asunto(s)
Neoplasias Esofágicas , Carcinoma de Células Escamosas de Esófago , Humanos , Carcinoma de Células Escamosas de Esófago/tratamiento farmacológico , Neoplasias Esofágicas/tratamiento farmacológico , Terapia Neoadyuvante/métodos , Estudios Prospectivos , Estadificación de Neoplasias , Esofagectomía/métodos , Resultado del Tratamiento , Quimioradioterapia , Estudios Retrospectivos
3.
Environ Res ; 225: 115577, 2023 05 15.
Artículo en Inglés | MEDLINE | ID: mdl-36871939

RESUMEN

Endocrine-disrupting compounds (EDC) are a group of exogenous chemicals that structurally mimic hormones and interfere with the hormonal signaling cascade. EDC interacts with hormone receptors, transcriptional activators, and co-activators, altering the signaling pathway at both genomic and non-genomic levels. Consequently, these compounds are responsible for adverse health ailments such as cancer, reproductive issues, obesity, and cardiovascular and neurological disorders. The persistent nature and increasing incidence of environmental contamination from anthropogenic and industrial effluents have become a global concern, resulting in a movement in both developed and developing countries to identify and estimate the degree of exposure to EDC. The U.S. Environment Protection Agency (EPA) has outlined a series of in vitro and in vivo assays to screen potential endocrine disruptors. However, the multidisciplinary nature and concerns over the widespread application demand alternative and practical techniques for identifying and estimating EDC. The review chronicles the state-of-art 20 years (1990-2023) of scientific literature regarding EDC's exposure and molecular mechanism, highlighting the toxicological effects on the biological system. Alteration in signaling mechanisms by representative endocrine disruptors such as bisphenol A (BPA), diethylstilbestrol (DES), and genistein has been emphasized. We further discuss the currently available assays and techniques for in vitro detection and propose the prominence of designing nano-architectonic-sensor substrates for on-site detection of EDC in the contaminated aqueous environment.


Asunto(s)
Disruptores Endocrinos , Neoplasias , Humanos , Disruptores Endocrinos/toxicidad , Dietilestilbestrol , Hormonas , Neoplasias/inducido químicamente , Transducción de Señal , Compuestos de Bencidrilo
4.
Environ Res ; 227: 115578, 2023 06 15.
Artículo en Inglés | MEDLINE | ID: mdl-36848977

RESUMEN

Efforts to restrict the emergence and progression of multidrug-resistant bacterial strains should heavily involve the scientific community, including government bodies, researchers, and industries, in developing new and effective photocatalytic antimicrobial agents. Such changes warrant the modernization and upscaling of materials synthesis laboratories to support and expedite the mass production of materials at the industrial scale for the benefit of humankind and the environment. Despite the massive volume of publications reporting the potential usage of different types of metal-based nanomaterials as antimicrobial agents, reviews uncovering the similarities and differences among the various products remain lacking. This review details the basic and unique properties of metal-based nanoparticles, their use as photocatalytic antimicrobial agents, and their therapeutic modes of action. It shall be noted that compared to traditional antibiotics, the mode of action of photocatalytic metal-based nanomaterials for killing microorganisms are completely different, despite displaying promising performance against antibiotic-resistant bacteria. Besides, this review uncovers the differences in the mode of actions of metal oxide nanoparticles against different types of bacteria, as well as towards viruses. Last but not least, this review comprehensively describes previous published clinical trials and medical usages involving contemporary photocatalytic antimicrobial agents.


Asunto(s)
Antiinfecciosos , Nanopartículas del Metal , Nanoestructuras , Antiinfecciosos/farmacología , Antibacterianos/farmacología , Bacterias , Óxidos , Metales
5.
Am J Otolaryngol ; 44(4): 103856, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37062150

RESUMEN

OBJECTIVE: Oral and esophageal cancer are the fourth and fifth leading causes of cancer deaths among men in Taiwan. Despite a good prognosis for oral cavity cancer patients, survival is worse for those who develop second primary esophageal cancer. There remains no consensus regarding early prevention of potential second primary esophageal cancer in patients with oral cavity cancer. Our study aimed to compare 5-year mortality between endoscopically screened and non-screened patients with oral cavity cancer and second primary esophageal cancer. MATERIALS AND METHODS: This study identified patients with incident oral cavity cancer and second primary esophageal cancer during 2004 and 2013 using the Taiwan Cancer Registry and National Health Insurance Research Database. We compared 5-year mortality from the second primary esophageal cancer diagnosis date between screened and non-screened groups of patients with oral cavity cancer and second primary esophageal cancer. RESULTS: A total of 217 screened and 305 non-screened oral cavity cancer patients with second primary esophageal cancer were studied. Endoscopic screening significantly improved early detection of second primary esophageal cancer (adjusted odds ratio: 0.34, 95 % confidence interval [CI]: 0.23-0.49) and reduced all-cause mortality (adjusted hazard ratio: 0.80; 95 % CI: 0.66-0.98). CONCLUSIONS: Oral cavity cancer patients with second primary esophageal cancer may have worse overall survival than those without. Early detection of second primary esophageal cancer is a crucial mediator between endoscopic screening and mortality. Endoscopic screening after the diagnosis of incident oral cavity cancer significantly increased early detection and reduced all-cause mortality.


Asunto(s)
Neoplasias Esofágicas , Neoplasias de la Boca , Neoplasias Primarias Secundarias , Masculino , Humanos , Taiwán/epidemiología , Detección Precoz del Cáncer , Neoplasias de la Boca/diagnóstico , Neoplasias Esofágicas/diagnóstico , Neoplasias Primarias Secundarias/diagnóstico
6.
Nano Lett ; 22(6): 2270-2276, 2022 Mar 23.
Artículo en Inglés | MEDLINE | ID: mdl-35225620

RESUMEN

Understanding the Coulomb interactions between two-dimensional (2D) materials and adjacent ions/impurities is essential to realizing 2D material-based hybrid devices. Electrostatic gating via ionic liquids (ILs) has been employed to study the properties of 2D materials. However, the intrinsic interactions between 2D materials and ILs are rarely addressed. This work studies the intersystem Coulomb interactions in IL-functionalized InSe field-effect transistors by displacement current measurements. We uncover a strong self-gating effect that yields a 50-fold enhancement in interfacial capacitance, reaching 550 nF/cm2 in the maximum. Moreover, we reveal the IL-phase-dependent transport characteristics, including the channel current, carrier mobility, and density, substantiating the self-gating at the InSe/IL interface. The dominance of self-gating in the rubber phase is attributed to the correlation between the intra- and intersystem Coulomb interactions, further confirmed by Raman spectroscopy. This study provides insights into the capacitive coupling at the InSe/IL interface, paving the way to developing liquid/2D material hybrid devices.

7.
BMC Cancer ; 22(1): 1086, 2022 Oct 22.
Artículo en Inglés | MEDLINE | ID: mdl-36271384

RESUMEN

BACKGROUND: Chemoradiotherapy (CRT), which might affect the autonomic system, is the mainstay therapy for advanced esophageal squamous cell carcinoma (ESCC). Autonomic dysfunction has been found to possibly lead to cancer mortality in those with elevated resting heart rates (RHR). Skin sympathetic nerve activity (SKNA) is a new method of stimulating electrical signals in skin to evaluate autonomic function from sympathetic tone. In this study, we investigated the association between changes in RHR and autonomic function and ESCC mortality. METHODS: Thirty-nine stage II-IV ESCC patients receiving CRT between March 2019 and November 2020 were prospectively enrolled and carefully selected, followed up and received the same meticulous supportive care. Serial RHR was recorded every two weeks from before CRT to eight weeks after CRT and average SKNA were recorded before and four weeks after CRT. All-cause mortality was defined as primary outcome. RESULTS: We found the RHR of ESCC patients to be significantly elevated and peaking at four weeks after CRT (p < 0.001) and then to gradually decrease. Those with an elevated RHR above the cutoff level (18 beat-per-minute) at eight weeks after CRT had worse overall survival. In addition, those with higher baseline sympathetic tone (average SKNA ≥ 0.86 µV) also had poor outcome. CONCLUSIONS: Increased pre-treatment sympathetic tone and elevated RHR after CRT are alarm signs of poor ESCC outcome. Further exploration of the mechanisms underlying these associations could potentially lead to intervention strategies for reducing mortality. TRIAL REGISTRATION: This study is registered with ClinicalTrials.gov, identifier: NCT03243448.


Asunto(s)
Neoplasias Esofágicas , Carcinoma de Células Escamosas de Esófago , Humanos , Quimioradioterapia/efectos adversos , Quimioradioterapia/métodos , Neoplasias Esofágicas/patología , Neoplasias Esofágicas/terapia , Carcinoma de Células Escamosas de Esófago/terapia , Frecuencia Cardíaca , Resultado del Tratamiento
8.
Nanotechnology ; 32(15): 155704, 2021 Apr 09.
Artículo en Inglés | MEDLINE | ID: mdl-33373982

RESUMEN

The magnetotransport properties of a hybrid InSe/monolayer graphene in a SiC system are systematically studied. Compared to those of its bare graphene counterpart, in InSe/graphene, we can effectively modify the carrier density, mobility, effective mass, and electron-electron (e-e) interactions enhanced by weak disorder. We show that in bare graphene and hybrid InSe/graphene systems, the logarithmic temperature (lnT) dependence of the Hall slope R H = Î´R xy /δB = Î´ρ xy /δB can be used to probe e-e interaction effects at various temperatures even when the measured resistivity does not show a lnT dependence due to strong electron-phonon scattering. Nevertheless, one needs to be certain that the change of R H is not caused by an increase of the carrier density by checking the magnetic field position of the longitudinal resistivity minimum at different temperatures. Given the current challenges in gating graphene on SiC with a suitable dielectric layer, our results suggest that capping a van der Waals material on graphene is an effective way to modify the electronic properties of monolayer graphene on SiC.

9.
Mar Drugs ; 18(2)2020 Jan 28.
Artículo en Inglés | MEDLINE | ID: mdl-32012819

RESUMEN

Astaxanthin, a xanthophyll belonging to the family of carotenoids, is a potent antioxidant. However, much less is known about its protective effects on the oxidative stress of ischemic optic nerve. We hypothesized that astaxanthin treatment could protect retinal ganglion cells (RGCs) from death via anti-oxidative and anti-apoptotic responses. Adult male Wistar rats were fed astaxanthin (100 mg/kg/day) by daily gavage for seven consecutive days, either before or after inducing oxidative stress in the retina by photodynamic treatment. The visual function, RGC apoptosis, macrophage infiltration in the optic nerve, expression of p-Akt, p-mTOR, SGK1, pS6K, Nrf2, p62, TNFα, Il1ß in retinas were investigated. The visual function and the RGC densities were significantly higher in both pre- and post-treatment groups. The numbers of apoptotic RGCs and extrinsic macrophage infiltration in the optic nerve were significantly decreased in both astaxanthin-treated groups. Furthermore, pre- and post-treatment of astaxanthin showed a higher expression of p-Akt, p-mTOR, Nrf2 and superoxide dismutase activity, and a lower expression of cleaved caspase-3, suggesting anti-apoptotic and anti-oxidative roles. Our findings indicate that astaxanthin can preserve visual function and reduce RGC apoptosis after ischemic insults. Including astaxanthin in daily diet as a supplement may be beneficiary for ischemic optic neuropathy.


Asunto(s)
Chlorophyta , Fármacos Neuroprotectores/farmacología , Animales , Modelos Animales de Enfermedad , Masculino , Nervio Óptico , Neuropatía Óptica Isquémica , Ratas , Células Ganglionares de la Retina , Xantófilas/farmacología
10.
Int J Mol Sci ; 21(17)2020 Aug 20.
Artículo en Inglés | MEDLINE | ID: mdl-32825440

RESUMEN

Even though advancement in medicine has contributed to the control of many diseases to date, cancer therapy continues to pose several challenges. Hepatocellular carcinoma (HCC) etiology is multifactorial. Recently, non-alcoholic fatty liver disease (NAFLD) has been considered as an important risk factor of HCC. NAFLD can be divided into non-alcoholic simple fatty liver (NAFL) and non-alcoholic steatohepatitis (NASH) based on histopathological features. Recently, studies have indicated that the gut microbiota is associated with NAFLD and HCC. Therefore, in this review, we have discussed the effects of gut microbiota-related mechanisms, including dysbiosis and gut barrier function, and gut microbiota-derived metabolites on NAFLD and HCC pathogenesis and the potential therapeutic strategies for NAFLD and HCC. With a better understanding of the gut microbiota composition and function, new and improved diagnostic, prognostic, and therapeutic strategies for common liver diseases can be developed.


Asunto(s)
Microbioma Gastrointestinal/fisiología , Neoplasias Hepáticas/etiología , Enfermedad del Hígado Graso no Alcohólico/complicaciones , Enfermedad del Hígado Graso no Alcohólico/microbiología , Enfermedad del Hígado Graso no Alcohólico/terapia , Animales , Disbiosis/complicaciones , Trasplante de Microbiota Fecal/métodos , Hepatitis/microbiología , Humanos , Estilo de Vida , Neoplasias Hepáticas/microbiología , Probióticos , Pérdida de Peso
11.
Int J Med Sci ; 16(12): 1549-1556, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31839742

RESUMEN

Spinal cord injury (SCI) can cause loss of mobility in the limbs, and no drugs, surgical procedures, or rehabilitation strategies provide a complete cure. Exercise capacity is thought to be associated with the causes of many diseases. However, no studies to date have assessed whether congenital exercise ability is related to the recovery of spinal cord injury. High congenital exercise ability (HE) and low congenital exercise ability (LE) mice were artificially bred from the same founder ICR mice. The HE and LE groups still exhibited differences in exercise ability after 13 generations of breeding. Histological staining and immunohistochemistry staining indicated no significant differences between the HE and LE groups on recovery of the spinal cord. In contrast, after SCI, the HE group exhibited better mobility in gait analysis and longer endurance times in the exhaustive swimming test than the LE group. In addition, after SCI, the HE group also exhibited less atrophy than the LE group, and no inflammatory cells appeared. In conclusion, we found that high congenital exercise ability may reduce the rate of muscle atrophy. This result can be applied to sports science and rehabilitation science as a reference for preventive medicine research.


Asunto(s)
Atrofia Muscular/terapia , Condicionamiento Físico Animal/fisiología , Recuperación de la Función , Traumatismos de la Médula Espinal/terapia , Animales , Modelos Animales de Enfermedad , Ejercicio Físico/fisiología , Humanos , Masculino , Ratones , Atrofia Muscular/fisiopatología , Condicionamiento Físico Animal/métodos , Médula Espinal/fisiopatología , Traumatismos de la Médula Espinal/fisiopatología
12.
Immunopharmacol Immunotoxicol ; 41(2): 207-213, 2019 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-30706742

RESUMEN

Objective: Inflammatory bowel disease (IBD) is generally considered as a major risk factor in the progression of colitis-associated colorectal cancer (CAC). Previous studies have indicated that the composition of gut microflora may be involved in CAC induction and progress. Bacteroides fragilis (BF) is a Gram-negative anaerobe belonging to colonic symbiotic bacteria of the host. This study was aimed to investigate the protective role of BF in a colorectal cancer (CRC) model induced by azoxymethane (AOM) and dextran sulfate sodium (DSS) in germ-free (GF) mice. Materials and methods: Total 22 GF mice were divided into two groups: GF and BF group. Half of the GF mice were colonized with BF for 28 days before CRC induction by AOM/DSS. Results: BF colonization increased animal survival (100%). Cecum weight and cecum/body weight ratio significantly decreased in BF/AOM/DSS group. Interestingly, there was a significant decrease in tumor number and tumor incidence in the BF/AOM/DSS group as compared to the GF/AOM/DSS group. The adenocarcinoma/adenoma incidence and histologic score were also decreased in the BF/AOM/DSS group. In addition, immunohistochemistry staining found decreased numbers of cell proliferation (PCNA) and inflammatory cell (granulocytes) infiltration in the colon mucosa of the BF group. The ß-catenin staining in the BF/AOM/DSS group had fewer and weaker positive signal expressions. Taking together, the BF colonization significantly ameliorated AOM/DSS-induced CRC by suppressing the activity of cell proliferation-related molecules and reducing the number of inflammatory cells. Conclusions: Symbiotic BF may play a pivotal role in maintaining the gastrointestinal immunophysiologic balance and regulating anti-tumorigenesis responses.


Asunto(s)
Azoximetano/toxicidad , Bacteroides fragilis/inmunología , Colitis , Neoplasias Colorrectales , Sulfato de Dextran/toxicidad , Vida Libre de Gérmenes , Animales , Colitis/inducido químicamente , Colitis/inmunología , Colitis/patología , Colitis/prevención & control , Neoplasias Colorrectales/inducido químicamente , Neoplasias Colorrectales/inmunología , Neoplasias Colorrectales/patología , Neoplasias Colorrectales/prevención & control , Masculino , Ratones
13.
Biochem Biophys Res Commun ; 493(2): 1075-1081, 2017 11 18.
Artículo en Inglés | MEDLINE | ID: mdl-28923247

RESUMEN

Different edible oils such as lard and soybean oil have been reported to interact with the gut microbiota, affecting host lipid metabolism. However, whether bacteria derived from the environment influence host lipid metabolism remains unclear. This study aimed to clarify the roles of environmental bacteria in host lipid storage and distribution with various edible oils. Gnotobiotic C57BL/6JNarl mice were inoculated with Lysinibacillus xylanilyticus and Paenibacillus azoreducens and then fed either a normal diet (LabDiet 5010, control group) or a diet containing 60% lard (L-group) or soybean oil (S-group) for 18 months. Interestingly, the S-group accumulated massive amounts of white adipose tissue compared to the L- and control groups, while the L-group displayed more hepatic steatosis and fatty droplets than the other groups. The expression of fatty acid synthase (FAS), hydroxymethylglutaryl-coenzyme A reductase (HMGCR), sterol regulatory element-binding protein 2 (SREBP2), and peroxisome proliferator-activated receptor gamma (PPARγ) in the livers of the L-group were markedly elevated compared to the S-group. FAS and PPARγ protein levels were also markedly elevated. However, there were no differences in the expression of the pro-inflammatory cytokines interleukin-6 and tumor necrosis factor-α between the groups. Our results suggest that environmental bacteria may affect host hepatic inflammation and lipid distribution in the presence of high-fat diets, with different effects depending on the fat type consumed.


Asunto(s)
Dieta Alta en Grasa/efectos adversos , Hígado Graso/metabolismo , Hígado Graso/microbiología , Metabolismo de los Lípidos , Hígado/metabolismo , Hígado/microbiología , Animales , Bacillaceae/fisiología , Grasas de la Dieta/efectos adversos , Grasas de la Dieta/metabolismo , Hígado Graso/patología , Hígado/patología , Masculino , Ratones Endogámicos C57BL , Paenibacillus/fisiología , Aceite de Soja/efectos adversos , Aceite de Soja/metabolismo
14.
Clin Res Hepatol Gastroenterol ; : 102470, 2024 Sep 22.
Artículo en Inglés | MEDLINE | ID: mdl-39317267

RESUMEN

BACKGROUND AND AIM: Given the obesity epidemic, nonalcoholic fatty liver disease has become a public health concern; however, the progression mechanism remains obscure. Therefore, experimental nonalcoholic fatty liver disease/steatohepatitis (NASH) animal models that reflect human disease are necessary. In this study, we simulated the effects of gut microbiota imbalance on NASH and liver fibrosis. METHODS: Different bacterial sources of lipopolysaccharide, including Escherichia coli (GEC) and Salmonella abortus equi (GSE), were combined with a Gubra Amylin NASH (GAN) diet to induce NASH and liver fibrosis. RESULTS: Serum levels of alanine aminotransferase, hydroxyproline, CD68-positive cells, α-smooth muscle actin, and glial fibrillary acidic protein as well as TNF-α, COL1A1, TGF-ß, and NLRP3 expressions in the livers of the GSE group were markedly increased compared to those in the GAN group. The GAN diet with lipopolysaccharide (LPS) treatment resulted in a marked difference in microbiota α-diversity. The GSE group had higher numbers ofincreased Erysipelotrichaceae, Akkermansiaceae, and Bacteroidaceae families than the other groups. CONCLUSIONS: Based on these results, the GAN diet combined with LPS treatment successfully induced the progression of liver disease to NASH and fibrosis. With consistent histologically proven fibrosis, this obese NASH mouse model has relatively good clinical translatability and is highly applicable for preclinical drug testing for NASH.

15.
Artículo en Inglés | MEDLINE | ID: mdl-39178609

RESUMEN

Dolutegravir (DLG) has become a distinctive first-line antiretroviral therapy for the treatment of HIV in most countries due to its affordability, high efficacy, and low drug-drug interactions. However, the evaluation of genotoxic impurities (GTIs) in DLG and their toxicity assessment has not been explored thoroughly. Thus, in this study, a simple, fast, and selective analytical methodology was developed for the identification and determination of 7 GTIs in the comprehensive, explicit route of synthesis for the dolutegravir sodium (DLG-Na) drug. A facile, fast ultrasonication-assisted liquid-liquid extraction procedure was adapted to isolate the GTIs in DLG-Na and then analyzed using the gas chromatography (GC)-electron impact (EI)/mass spectrometer (MS) quantification (using selective ion monitoring mode) technique. This EI-GC/MS method was validated as per the current requirements of ICH Q2 (R1) guidelines. Under optimal method conditions, excellent linearities were achieved with R between 0.9959 and 0.9995, and high sensitivity was obtained in terms of detection limits (LOD) between 0.15 to 0.63 µg/g, and quantification limits (LOQ) between 0.45 to 1.66 µg/g for the seven GTIs in DLG. The obtained recoveries ranged from 98.2 to 104.3 % at LOQ, 15 µg/g, and 18 µg/g concentration levels (maximum daily dose of 100 mg). This developed and validated method is rapid, easy to adopt, specific, sensitive, and accurate in estimating the seven GTIs in a relatively complex sodium matrix of the DLG-Na drug moiety. As a method application, two different manufactured samples of DLG-Na drug substances were analyzed for the fate of the GTIs and drug safety for the intended dosage applications. Moreover, an in-silico QSAR toxicity prediction assessment was carried out to prove scientifically the potential GTI nature of each impurity from the alerting functional groups.


Asunto(s)
Contaminación de Medicamentos , Cromatografía de Gases y Espectrometría de Masas , Compuestos Heterocíclicos con 3 Anillos , Límite de Detección , Oxazinas , Piperazinas , Piridonas , Compuestos Heterocíclicos con 3 Anillos/química , Compuestos Heterocíclicos con 3 Anillos/análisis , Piperazinas/química , Piperazinas/análisis , Piridonas/química , Piridonas/análisis , Cromatografía de Gases y Espectrometría de Masas/métodos , Oxazinas/química , Reproducibilidad de los Resultados , Modelos Lineales , Mutágenos/análisis , Fármacos Anti-VIH/análisis , Fármacos Anti-VIH/química , Extracción Líquido-Líquido/métodos , Sonicación/métodos , Simulación por Computador , Humanos
16.
Microbiol Spectr ; 12(1): e0186823, 2024 Jan 11.
Artículo en Inglés | MEDLINE | ID: mdl-38018983

RESUMEN

IMPORTANCE: The link between gut microbiota and diet is crucial in the development of non-alcoholic steatohepatitis (NASH). This study underscores the essential role of a healthy diet in preventing and treating NASH by reversing obesity, lipidemia, and gut microbiota dysbiosis. Moreover, the supplementation of functional food or drug to the diet can provide additional advantages by inhibiting hepatic inflammation through the modulation of the hepatic inflammasome signaling pathway and partially mediating the gut microbiota and lipopolysaccharide signaling pathway. This study highlights the importance of adopting healthy dietary habits in treating NASH and proposes that supplementing with ginger essential oil or obeticholic acid may offer additional benefits. Nonetheless, further clinical studies are necessary to validate these findings.


Asunto(s)
Microbioma Gastrointestinal , Enfermedad del Hígado Graso no Alcohólico , Humanos , Enfermedad del Hígado Graso no Alcohólico/tratamiento farmacológico , Dieta Saludable , Dieta Alta en Grasa/efectos adversos , Hígado/metabolismo
17.
Adv Colloid Interface Sci ; 328: 103163, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38749384

RESUMEN

Repairing and regenerating damaged tissues or organs, and restoring their functioning has been the ultimate aim of medical innovations. 'Reviving healthcare' blends tissue engineering with alternative techniques such as hydrogels, which have emerged as vital tools in modern medicine. Additive manufacturing (AM) is a practical manufacturing revolution that uses building strategies like molding as a viable solution for precise hydrogel manufacturing. Recent advances in this technology have led to the successful manufacturing of hydrogels with enhanced reproducibility, accuracy, precision, and ease of fabrication. Hydrogels continue to metamorphose as the vital compatible bio-ink matrix for AM. AM hydrogels have paved the way for complex 3D/4D hydrogels that can be loaded with drugs or cells. Bio-mimicking 3D cell cultures designed via hydrogel-based AM is a groundbreaking in-vivo assessment tool in biomedical trials. This brief review focuses on preparations and applications of additively manufactured hydrogels in the biomedical spectrum, such as targeted drug delivery, 3D-cell culture, numerous regenerative strategies, biosensing, bioprinting, and cancer therapies. Prevalent AM techniques like extrusion, inkjet, digital light processing, and stereo-lithography have been explored with their setup and methodology to yield functional hydrogels. The perspectives, limitations, and the possible prospects of AM hydrogels have been critically examined in this study.


Asunto(s)
Hidrogeles , Ingeniería de Tejidos , Hidrogeles/química , Humanos , Ingeniería de Tejidos/métodos , Bioimpresión/métodos , Impresión Tridimensional , Animales , Sistemas de Liberación de Medicamentos , Técnicas de Cultivo de Célula , Técnicas de Cultivo Tridimensional de Células/métodos
18.
Invest Ophthalmol Vis Sci ; 65(10): 17, 2024 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-39115865

RESUMEN

Purpose: The Rho-associated protein kinase and myosin light chain kinase (ROCK/MYLK) pathway undeniably plays a pivotal role in the pathophysiology of primary open-angle glaucoma (POAG). In our study, we utilized both ocular hypertension (OHT) rabbit models and clinical investigations to gain invaluable insights that propel the development of novel treatments targeting proteins and genes associated with the trabecular meshwork (TM), thereby offering promising avenues for the management of POAG. Methods: Following microbead injections into the anterior chamber of the ocular cavity of rabbits, we observed elevated histiocyte numbers and immune scores for MYLK-4/ pMLC-2, alongside a reduction in the void space within the TM. Notably, treatment was performed with 0.1% ITRI-E-(S)-4046, a compound with dual kinase inhibitor (highly specific inhibitor of ROCK1/2 and MYLK4), significantly reduced intraocular pressure (IOP; P < 0.05) and expanded the void space within the TM (P < 0.0001) compared with OHT rabbits. In clinical investigations, we utilized whole transcriptome sequencing to analyze gene expression specifically related to the TM, obtained from patients (5 early-onset and 5 late-onset) undergoing trabeculectomy. Results: Our findings revealed 103 differential expression genes (DEGs) out of 265 molecules associated with the Rho family GTPase pathway, exhibiting a P value of 1.25E-10 and a z-score of -2.524. These results underscore significant differences between the early-onset and late-onset POAG and highlight the involvement of the ROCK/MYLK pathway. Conclusions: These findings underscore the critical involvement of the ROCK/MYLK pathway in both OHT-related and different onsets of POAG, providing valuable insights into the TM-related molecular mechanisms underlying the disease.


Asunto(s)
Modelos Animales de Enfermedad , Glaucoma de Ángulo Abierto , Presión Intraocular , Quinasa de Cadena Ligera de Miosina , Hipertensión Ocular , Malla Trabecular , Quinasas Asociadas a rho , Animales , Malla Trabecular/metabolismo , Malla Trabecular/patología , Quinasas Asociadas a rho/genética , Conejos , Hipertensión Ocular/genética , Hipertensión Ocular/fisiopatología , Hipertensión Ocular/metabolismo , Presión Intraocular/fisiología , Humanos , Glaucoma de Ángulo Abierto/genética , Glaucoma de Ángulo Abierto/metabolismo , Glaucoma de Ángulo Abierto/fisiopatología , Quinasa de Cadena Ligera de Miosina/genética , Quinasa de Cadena Ligera de Miosina/metabolismo , Masculino , Femenino , Transducción de Señal , Anciano , Persona de Mediana Edad
19.
Commun Biol ; 7(1): 749, 2024 Jun 20.
Artículo en Inglés | MEDLINE | ID: mdl-38902371

RESUMEN

Dietary emulsifiers are linked to various diseases. The recent discovery of the role of gut microbiota-host interactions on health and disease warrants the safety reassessment of dietary emulsifiers through the lens of gut microbiota. Lecithin, sucrose fatty acid esters, carboxymethylcellulose (CMC), and mono- and diglycerides (MDG) emulsifiers are common dietary emulsifiers with high exposure levels in the population. This study demonstrates that sucrose fatty acid esters and carboxymethylcellulose induce hyperglycemia and hyperinsulinemia in a mouse model. Lecithin, sucrose fatty acid esters, and CMC disrupt glucose homeostasis in the in vitro insulin-resistance model. MDG impairs circulating lipid and glucose metabolism. All emulsifiers change the intestinal microbiota diversity and induce gut microbiota dysbiosis. Lecithin, sucrose fatty acid esters, and CMC do not impact mucus-bacterial interactions, whereas MDG tends to cause bacterial encroachment into the inner mucus layer and enhance inflammation potential by raising circulating lipopolysaccharide. Our findings demonstrate the safety concerns associated with using dietary emulsifiers, suggesting that they could lead to metabolic syndromes.


Asunto(s)
Disbiosis , Emulsionantes , Microbioma Gastrointestinal , Enfermedades Metabólicas , Animales , Disbiosis/inducido químicamente , Disbiosis/microbiología , Microbioma Gastrointestinal/efectos de los fármacos , Ratones , Masculino , Enfermedades Metabólicas/inducido químicamente , Enfermedades Metabólicas/microbiología , Enfermedades Metabólicas/metabolismo , Enfermedades Metabólicas/etiología , Ratones Endogámicos C57BL , Carboximetilcelulosa de Sodio , Sacarosa/efectos adversos , Sacarosa/administración & dosificación , Sacarosa/metabolismo , Resistencia a la Insulina , Lecitinas
20.
Nutr Diabetes ; 14(1): 65, 2024 08 16.
Artículo en Inglés | MEDLINE | ID: mdl-39152116

RESUMEN

BACKGROUND: Diet and gut microbiota contribute to non-alcoholic steatohepatitis (NASH) progression. High-fat diets (HFDs) change gut microbiota compositions, induce gut dysbiosis, and intestinal barrier leakage, which facilitates portal influx of pathogen-associated molecular patterns including lipopolysaccharides (LPS) to the liver and triggers inflammation in NASH. Current therapeutic drugs for NASH have adverse side effects; however, several foods and herbs that exhibit hepatoprotection could be an alternative method to prevent NASH. METHODS: We investigated ginger essential oil (GEO) against palm oil-containing HFDs in LPS-injected murine NASH model. RESULTS: GEO reduced plasma alanine aminotransferase levels and hepatic pro-inflammatory cytokine levels; and increased antioxidant catalase, glutathione reductase, and glutathione levels to prevent NASH. GEO alleviated hepatic inflammation through mediated NLR family pyrin domain-containing 3 (NLRP3) inflammasome and LPS/Toll-like receptor four (TLR4) signaling pathways. GEO further increased beneficial bacterial abundance and reduced NASH-associated bacterial abundance. CONCLUSION: This study demonstrated that GEO prevents NASH progression which is probably associated with the alterations of gut microbiota and inhibition of the LPS/TLR4/NF-κB pathway. Hence, GEO may offer a promising application as a dietary supplement for the prevention of NASH.


Asunto(s)
Microbioma Gastrointestinal , Inflamasomas , Lipopolisacáridos , Ratones Endogámicos C57BL , Proteína con Dominio Pirina 3 de la Familia NLR , Enfermedad del Hígado Graso no Alcohólico , Aceites Volátiles , Transducción de Señal , Receptor Toll-Like 4 , Zingiber officinale , Animales , Enfermedad del Hígado Graso no Alcohólico/prevención & control , Enfermedad del Hígado Graso no Alcohólico/metabolismo , Proteína con Dominio Pirina 3 de la Familia NLR/metabolismo , Microbioma Gastrointestinal/efectos de los fármacos , Receptor Toll-Like 4/metabolismo , Aceites Volátiles/farmacología , Aceites Volátiles/uso terapéutico , Ratones , Inflamasomas/metabolismo , Inflamasomas/efectos de los fármacos , Masculino , Transducción de Señal/efectos de los fármacos , Dieta Alta en Grasa/efectos adversos , Progresión de la Enfermedad , Hígado/metabolismo , Hígado/efectos de los fármacos , Modelos Animales de Enfermedad
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